Promote Level 2 errors as errors, not warnings

This policy setting allows you to treat Level 2 errors as warnings instead of errors. Level 2 errors occur when the message signature appears to be valid, but there are other issues with the signature.

If you enable this policy setting, Level 2 errors will be treated as warnings.

If you disable or do not configure this policy setting, Level 2 errors will be treated as errors

When you specify a value for PromoteErrorsAsWarnings, note that potential Level 2 error conditions include the following: